Look round bottom of lane for a sign (3)
I believe the answer is:
leo
'a sign' is the definition.
(star sign)
'look round bottom of lane' is the wordplay.
'look' becomes 'lo'.
'round' is an insertion indicator.
'bottom of' suggests the final letters.
The last letter of 'lane' is 'e'.
'lo' going around 'e' is 'LEO'.
'for' is the link.
(Other definitions for leo that I've seen before include "born in July or August" , "certain stars" , "Name taken by 13 popes, the last dying in 1903 aged 93" , "house" , "Horoscope sign" .)